Windows



y 8, 1963 E. H. SAHLERTZ 3,091,006 1 WINDOWS M1.

Filed Aug. 1, 1961 INVENTOR. [EdiflWZl/FJA/M [IP72 BY W 30910061 OR: IN'4-91.55:

United States Patent 3,091,006 WINDOWS Ebbe Herluf Sahlertz, 111 VcsterVoldgade, Copenhagen, Denmark Filed Aug. 1, 1961, Ser. No. 128,571Claims priority, application Denmark Aug. 4, 1960 2 Claims. (Cl. 20-53)This invention relates to a window construction prefer-ably for use inbuildings, which may be subjected to very much sunshine and the objectof the invention is to provide means bywhichit is possibl e lo cut-olfan esseptial part of the heat radiation from the hine and to reestablishthe transparencfif'thdwifidovW'"" It is a further object of theinvention to provide such a window with means by which a materialcapable of refiectingan essential part of the 'heat radi 'on may easilybe placed inithefsp'ac between twoplatfes oft ransparent materialformingth indowand also to provide means for displacing said materialfrom said space.

Further objects will appear from the following description.

In a window construction consisting of at least two plates oftransparent material placed parallel to one another and forming a narrowspace, the edges of the plates being surrounded by an airtight frameclosing said space, the fundamental features of the invention consist inthe provision of a chamber along one horizontal side of the frame, saidchamber containing an easy-running granulate, the window constructionbeing further provided with means for transferring the granulate fromthe chamber to the space and vice versa.

The invention will be best understood with reference to the accompanyingdrawing, which shows a cut-out part of a window construction inaccordance with the invention.

The drawing shows a part of a window suspended in a fixed wallframe 1and comprising a windowframe 2 enclosing two closely spaced panes 3 and4, a pair of grooves 5 and 6 being provided on the inside of the majorpart of the frame for receiving the edges of the panes 3 and 4 while arib 7 is provided between these grooves to provide the predeterminedspacing of the panes 3' and 4. The window also comprises an extra pane 8positioned in the frame 2 by means of a groove 9 formed between theframe 2 itself and a last 10, the groove 9 receiving the edge of thepane 8.

On the frame 2 is a pivot fitting 11 receiving a pivot pin 12 carried bya tapsocket 13 which in turn is secured to the fixed wallframe 1. Onlyone of these pivoting arrangements is shown in the drawing but acorresponding arrangement is of course provided on the opposite side ofthe frames 1 and 2.

The upper edges of the glass panes 3- and 4 extend upwardly into achamber 14 in the upper part of the frame 2. Between the glass pane 3and the frame 2 is clamped a flap 15 the free portion of which overhangsthe upper edges of the panes 3 and 4, and along the free edge of thisflap 15 a rod 16 is attached in order to increase the weight of the flap15.

The outer edge of the flap 15 or the rod 16 is connected by means of acord 17 with the free end of an arm 18 the other end of which is fixedto a pivoting rod 19 extending through a packing 20 to the outside ofthe frame 2, where it is connected to an anm 21 the free end of which ispivotally connected with a rod 22 terminating at its lower end in ahandle 23.

The chamber 14 contains a granulate or the like such as small glassbeads 24 and when the rod 22 is pulled the pivoted rod 19 is turned tomove the arm 18 upwardly whereupon the flap 15 is lifted and the glassbeads slide Patented May 28, 1963 downwardly into the space between thetwo glass panes 3 and 4.

The chamber 14 is closed at the top by a resilient wall 25 fastened tothe inside of the chamber by means of flanges 26 and 27. The resilientwa-ll serves the purpose of equalization of varying pressures arising asa result of temperature variations in the air contained in the spacebetween the glass panes 3 and 4 and in the chamber itself, and to allowsuch equalization the frame 2 has a hole 28 connecting the space abovethe resilient wall 25 with the outside air. This insures that no air canenter the space comprising the chamber and the space between the glasspanes 3 and 4, and thus by initially drying the air in this space anyformation of condensed moisture is obviated. Means for absorbingmoisture may also be placed in the chamber.

When the glasssbcads fill up the space between the glass panes Sand 4the window will have the appearance of frosted glass such as sandblastedglass and although this somewhat reduces the passage of visible lightthis loss of light is not of any signifiance and generally an advantagein the case of direct radiation from the sun.

The window provides a diffused light and at the samg/ 25' time reducessubstantially the passage of heatrays.

When it is desired again to render the window clear, it is turned aboutthe pins 12, whereby the flap 15 will be carried to hang downward andthus allow the glass beads to slide into the chamber 14.

When the window is then turned back to its closed position the flap 15due to the action of the weight of the rod 16 will fall back against thetop-edges of the glasspanes 3 and 4, and will thus prevent the glassbeads from flowing back into the space between the glasspanes until theflap 15 is lifted again by pulling on the rod 22.

The use of glass beads has proved to be extremely advantageousparticularly because the use of uncoloured glass 'beads prevents anycolouring of the light passing through the window. Nevertheless it isobvious that coloured glass beads or other granulates which aregenerally sufficiently finely divided may be used in order to reduce orcolour the light if required. One of the advantages in using a granulateis that this has no tendency to adhere to the glass panes and thus whenthe window has been turned to remove the granulate from the spacebetween the glass panes 3 and 4 a completely clear and transparentwindow results.

Alternatively the removal of the granulate from the space between theglass panes 3 and 4 may be conveniently achieved as by a pumping devicewhich conveys the material to the chamber 14, for example, through aduct in the frame 2.

What I claim is:

1. In a window construction comprising at least two plates oftransparent material placed generally parallel to one another anddefining a space therebetween, an airtight window frame disposed aroundsaid plates and pivotally mounted in a wall frame for movement intodifferent vertical positions, a chamber extending along one horizontalside of said frame, an easy running granulate in said chamber insufiicient quantity for filling said space between said plates andpassage means permitting the transfer of said granulate from saidchamber to said space and from said space to said chamber, said passagemeans comprising a longitudinal slot defined in said frame and extendingsubstantially the full length of said horizontal side and includingmeans for opening and closing said passage means.

2. In a window construction comprising at least two plates oftransparent material placed generally parallel to one another anddefining a space therebetween, an airtight window frame disposed aroundsaid plates and pivotally mounted in a wall frame for movement intodifferent vertical positions, a chamber extending along one horizontalside of said frame, an easy running granulate in said chamber insufiicient quantity for filling said space between said plates, passagemeans comprising a longitudinal slot defined in said frame and extendingsubstantially the full length of said horizontal side, and meansReferences Cited in the file of this patent UNITED STATES PATENTS JansenDec. 30, 1947 Howard July 18, 1950

1. IN A WINDOW CONSTRUCTION COMPRISING AT LEAST TWO PLATES OFTRANSPARENT MATERIAL PLACED GENERALLY PARALLEL TO ONE ANOTHER ANDDEFINING A SPACE THEREBETWEEN, AN AIRTIGHT WINDOW FRAME DISPOSED AROUNDSAID PLATES AND PIVOTALLY MOUNTED IN A WALL FRAME FOR MOVEMENT INTODIFFERENT VERTICAL POSITIONS, A CHAMBER EXTENDING ALONG ONE HORIZONTALSIDE OF SAID FRAME, AN EASY RUNNING GRANULATE IN SAID CHAMBER INSUFFICIENT QUANTITY FOR FILLING SAID SPACE BETWEEN SAID PLATES ANDPASSAGE MEANS PERMITTING THE TRANSFER OF SAID GRANULATE FROM SAIDCHAMBER TO SAID SPACE AND FROM SAID SPACE TO SAID CHAMBER, SAID PASSAGEMEANS COMPRISING A LONGITUDINAL SLOT DEFINED IN SAID FRAME AND EXTENDINGSUBSTANTIALLY THE FULL LENGTH OF SAID HORIZONTAL SIDE AND INCLUDINGMEANS FOR OPENING AND CLOSING SAID PASSAGE MEANS.